1 /* Copyright (C) 1995-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
19 # error "Never include <bits/sem.h> directly; use <sys/sem.h> instead."
22 #include <sys/types.h>
23 #include <bits/sem-pad.h>
25 /* Flags for `semop'. */
26 #define SEM_UNDO 0x1000 /* undo the operation on exit */
28 /* Commands for `semctl'. */
29 #define GETPID 11 /* get sempid */
30 #define GETVAL 12 /* get semval */
31 #define GETALL 13 /* get all semval's */
32 #define GETNCNT 14 /* get semncnt */
33 #define GETZCNT 15 /* get semzcnt */
34 #define SETVAL 16 /* set semval */
35 #define SETALL 17 /* set all semval's */
38 #if __SEM_PAD_BEFORE_TIME
39 # define __SEM_PAD_TIME(NAME, RES) \
40 __syscall_ulong_t __glibc_reserved ## RES; __time_t NAME
41 #elif __SEM_PAD_AFTER_TIME
42 # define __SEM_PAD_TIME(NAME, RES) \
43 __time_t NAME; __syscall_ulong_t __glibc_reserved ## RES
45 # define __SEM_PAD_TIME(NAME, RES) \
49 /* Data structure describing a set of semaphores. */
52 struct ipc_perm sem_perm
; /* operation permission struct */
53 __SEM_PAD_TIME (sem_otime
, 1); /* last semop() time */
54 __SEM_PAD_TIME (sem_ctime
, 2); /* last time changed by semctl() */
55 __syscall_ulong_t sem_nsems
; /* number of semaphores in set */
56 __syscall_ulong_t __glibc_reserved3
;
57 __syscall_ulong_t __glibc_reserved4
;
60 /* The user should define a union like the following to use it for arguments
65 int val; <= value for SETVAL
66 struct semid_ds *buf; <= buffer for IPC_STAT & IPC_SET
67 unsigned short int *array; <= array for GETALL & SETALL
68 struct seminfo *__buf; <= buffer for IPC_INFO
71 Previous versions of this file used to define this union but this is
72 incorrect. One can test the macro _SEM_SEMUN_UNDEFINED to see whether
73 one must define the union or not. */
74 #define _SEM_SEMUN_UNDEFINED 1
81 # define SEM_STAT_ANY 20
97 #endif /* __USE_MISC */